The Clan of the Cave Bear

Suddenly, from another direction came the thwack, thwack of two stones fired in quick succession. They landed squarely on the [hyena]'s head and [it] dropped in its tracks.

"There are forces stronger than any magic, but it worked for many years. No one understands spirits completely, not even Mog-ur."

"With a spear, you only need a strong arm," Brun said.

"And strong legs and heart, and good lungs, and a great deal of courage," Zoug replied.